Very interesting: it is when I adjusted VR1 again while attempting tuning with a chromatic tuner that I encountered the weird behaviour described previously: on turning it clockwise, the pitch does rise, but when I reach maximum, it starts falling again. The similar odd behaviour happens in the other direction.
Can anyone confirm this is normal or not?
In the end of the tuning session today, I max out VR10 for each voice without reaching the proper pitch - quite frustrating.
Yash
Yash
---In PolySix@yahoogroups.com, <gacki@...> wrote:The multiplexer/demultiplexer thing:
Correction voltage from VR1 enters IC39 X7. This voltage must come back
from IC31 X7 through IC18 at the bottom left of your schematic.
The two controlling signals for this seem to be MUXSELA for the Offset
correction (X7) and INH for the other correction (X6 to optocoupler).